Calculate the relative molecular weights of substances that have the following formulas: a) Cl2, O3, P4

Calculate the relative molecular weights of substances that have the following formulas: a) Cl2, O3, P4, b) CO, H2S, H3PO4

а) Mr (Cl2) = 71, Mr (O3) = 48, Mr (P4) = 124,

б)Mr (CO) = 28, Mr (H2S) = 34, Mr (H3PO4) = 98,



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